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Finding the Fourth Proportional to 191.22, 263.85 and 112.56

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Solution

The fourth proportional to 191.22, 263.85 and 112.56 is: 155.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.22 : 263.85 = 112.56 : x
  2. Step 2: Convert to fraction form
    191.22/263.85 = 112.56/x
  3. Step 3: Cross multiply
    191.22x = 263.85 × 112.56
  4. Step 4: Simplify right side
    191.22x = 29,698.96
  5. Step 5: Solve for x
    x = 29,698.96/191.22
  6. Step 6: Final answer
    x = 155.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.